Antiskid device



Aug. 8, 1933.

A J. B. KEANEY ANTISKID DEVICE Filed Sept. 24, 1932 Mm Winery 73. 'Zqvze/ Patented Aug. 8, 1933 UNITED STATES PATENT OFFICE one-half to Gustav Mass.

J. Johnson, Marlboro,

Application September 24, 1932 Serial No. 634,696

1 Claim.

This invention relates to an anti-skid device for application to a pneumatic or other tire to prevent the skidding of the vehicle on which the tire is used.

The principal objects of the invention are to provide an anti-skid device or safety grip in which flanges are provided ior engaging the ground, which flanges are slanted alternately in opposite directions so as to provide narrowing spaces into which the dirt will be forced if the wheel starts to skid sideways in either direction; to provide these iianges on plates which are individually connected with chain links to form a unitary7 structure and to provide the said narrowing spaces alternately in a chain link and in the space between two chain links.

Other objects and advantages of the invention will appear hereinafter.

u Reference is to be had to the accompanying drawing, in which Fig. l is a plan of a single anti-skid device constructed in accordance with this invention;

Fig. 2 is an edge elevation;

25 Fig. 3 is a side view on enlarged scale of the same device shown in the position that it occupies on a tire;

Fig. 4 is a plan of a blank cut out to the proper shape before the flanges are turned up as they are shown in the other figures, and

Fig. 5 is an end View of the same.

The anti-skid device is made up of a series of plates of sheet metal, each provided with two flanges l1 which are intended to be bent up at right angles to the plane of the main body of the plate on a line 12. These lines 12 are located near the opposite sides of the plate and they make an acute angle with each other. Thus, when the iianges are turned up at right angles about these lines, the i'langes will project at right angles but will make an acute angle with each other. The flanges are spaced from the end part 13 of the plate and this end part is provided with two perforations 14 while the opposite end of the plate is provided with a pair of corresponding perforations 14 on opposite sides of the plate. A substantially central and larger perforation 15 is shown which is provided merely for the purpose of lightening the plate and facilitating its cleaning.

It will be noticed that all of these plates are made exactly the same and not rights and lefts and they are connected up by double chain links 16 connected throughthe perforations 14.

These chain links are arranged in two series parallel with each other to constitute a chain construction and their ends are connected and provided with a hook 17, at one end having a pivoted locking member 18 and a slot 19 into which the other end o1' the device is to be connected. The other end comprises a water-proof strap 20 connected with the side chains and provided with a series of wire loops 21. Thus the connection is adjustable. 6

Only a single set of dies is necessary for cutting out the plates 10 and bending up the anges. These plates are reduced to the simplest terms. The assembly also is very simple. Replacement of a plate that is injured is very easy. In fact, if the central plate wears much faster than the side ones, they can be inter-V changed quickly and a new safety grip is provided without introducing any new parts.

Side skidding is prevented with equal erficiency in either direction because the space in la plate between the two iianges 11 has its counterpart between two anges 11 between two adjacent plates, but it resists motion in the opposite direction. This resistance is due to the fact that 8 upon skidding the dirt will become wedged, in either case, into a triangular space between two flanges.

This anti-skid device can be used as a mud hook, one or more of them being applied to the tire across its face with the chain of each, made up of the plates and links, passing through between the spokes of the wheel. Also they can be used, as the weed chains are, secured at their ends to a pair of circumferential chains.

Although I have illustrated and described only one form oi the invention I am aware of the fact that modiiications can be made Ytherein by any person skilled in the art without departing from the scope of the invention as expressed in the claim. Therefore, I do not wish to be limited in this respect otherwise than as set forth in the claim but what I claim is:-

As an article of manufacture, an anti-skid cross chain made up of a plurality of plates, each having anges turned outwardly from its opposite edges and making an angle with each other, said plates being located side by side with the apexes of the triangles formed by the iianges all at the same side of the cross chain, whereby the flanges of two adjacent plates'forrn a triangle with its apex on the opposite side.

JAMES B. KEANEY. 

